package com.sky.handler;

import com.sky.constant.MessageConstant;
import com.sky.exception.BaseException;
import com.sky.exception.BusinessException;
import com.sky.exception.LoginRequiredException;
import com.sky.exception.WeChatLoginException;
import com.sky.result.Result;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestControllerAdvice;

import java.sql.SQLIntegrityConstraintViolationException;

/**
 * 全局异常处理器，处理项目中抛出的业务异常
 */
@RestControllerAdvice
@Slf4j
public class GlobalExceptionHandler {

    /**
     * 捕获业务异常
     *
     * @param ex
     * @return
     */
    @ExceptionHandler
    public Result exceptionHandler(BaseException ex) {
        log.error("异常信息：{}", ex.getMessage());
        return Result.error(ex.getMessage());
    }

    @ExceptionHandler
    public Result exceptionHandler(SQLIntegrityConstraintViolationException ex) {
        // Duplicate entry 'zhangsan' for key 'employee.idx_username'
        String message = ex.getMessage();
        if (message.contains("Duplicate entry")) {
            String[] split = message.split(" ");
            String username = split[2];
            String msg = username + MessageConstant.ALREADY_EXISTS;
            return Result.error(msg);
        } else {
            return Result.error(MessageConstant.UNKNOWN_ERROR);
        }
    }

    @ExceptionHandler(LoginRequiredException.class)
    public Result<Void> handleLoginRequiredException(LoginRequiredException e) {
        return Result.error(e.getMessage()); // 返回"请先登录"
    }

    @ExceptionHandler(BusinessException.class)
    public Result<Void> handleBusinessException(BusinessException e) {
        return Result.error(e.getMessage()); // 返回具体业务错误
    }
    // 处理微信登录异常
    @ExceptionHandler(WeChatLoginException.class)
    public Result<Void> handleWeChatLoginException(WeChatLoginException e) {
        log.error("微信登录异常：{}", e.getMessage());
        return Result.error(e.getMessage());
    }

    // 处理系统异常
    @ExceptionHandler(Exception.class)
    @ResponseBody
    public Result<Void> handleSystemException(Exception e) {
        log.error("系统异常", e);
        return Result.error("系统繁忙，请稍后重试");
    }
}
